Wall clock time and date at job start Sat Apr 11 2020 06:09:59 AMSOL-version 7.1 by G. D. Hawkins, D. J. Giesen, G. C. Lynch, C. C. Chambers, I. Rossi, J. W. Storer, J. Li, J. D. Thompson, P. Winget, B. J. Lynch, D. Rinaldi, D. A. Liotard, C. J. Cramer, and D. G. Truhlar Copyright 2004 by Regents of the University of Minnesota. All rights reserved. Notice: recipients of this code are asked to comply with the user agreement in Section 1 of the documentation file. ******************************************************************************* * 1SCF - SCF CALCULATION WITHOUT GEOMETRY OPTIMIZATION * - USE EF ROUTINE FOR MINIMUM SEARCH (DEFAULT) * GEO-OK - OVERRIDE INTERATOMIC DISTANCE CHECK * TLIMIT= - A TIME OF 15. SECONDS REQUESTED * CHARGE - CHARGE ON SYSTEM= -1 * AM1 - THE AM1 HAMILTONIAN TO BE USED * DEV - DEVELOPER OPTIONS ARE ALLOWED * SM5.42R - SM5.42R CALCULATIONS WILL BE PERFORMED * - CHARGE MODEL 2 WILL BE USED (CM2A) * - THE SOLVENT IS USER-SPECIFIED * DIELEC - THE SOLVENT DIELECTRIC CONSTANT IS 2.06 * IOFR - THE SOLVENT INDEX OF REFRACTION IS 1.4345 * ALPHA - THE SOLVENT ALPHA IS 0.00 * BETA - THE SOLVENT BETA IS 0.00 * GAMMA - THE SOLVENT MACROSCOPIC SURFACE TENSION IS * 38.93 CAL MOL^-1 ANGSTROM^-2 * FACARB - THE FRACTION OF AROMATIC CARBONS IS 0.00 * FEHALO - THE FRACTION OF ELECTRONEGATIVE HALOGENS IS 0.00 ******************************************************************************* Atom NO. Chemical Bond length Bond angle Dihedral angle number (k) symbol (angstroms) (degrees) (degrees) (I) NA:I NB:NA:I NC:NB:NA:I NA NB NC 1 1 C 2 2 O 1.42898 * 1 3 3 C 1.42904 * 113.99873 * 2 1 4 4 C 1.53000 * 109.47049 * 179.97438 * 3 2 1 5 5 C 1.52997 * 109.47395 * 179.97438 * 4 3 2 6 6 C 1.52994 * 109.47602 * 180.02562 * 5 4 3 7 7 H 1.09003 * 109.46930 * 304.99978 * 6 5 4 8 8 C 1.52996 * 109.47309 * 65.00155 * 6 5 4 9 9 C 1.50701 * 109.47286 * 185.00128 * 6 5 4 10 10 O 1.21280 * 119.99935 * 0.02562 * 9 6 5 11 11 N 1.34774 * 119.99972 * 179.97438 * 9 6 5 12 12 C 1.47483 * 125.66208 * 359.96567 * 11 9 6 13 13 C 1.55024 * 104.89709 * 204.04042 * 12 11 9 14 14 C 1.54511 * 101.52940 * 323.62821 * 13 12 11 15 15 C 1.47186 * 125.66184 * 180.02562 * 11 9 6 16 16 C 1.52106 * 109.89799 * 153.09668 * 14 13 12 17 17 N 1.47313 * 108.60964 * 72.25962 * 16 14 13 18 18 C 1.36944 * 121.06475 * 229.35908 * 17 16 14 19 19 H 1.07993 * 120.00098 * 26.43462 * 18 17 16 20 20 C 1.38817 * 119.99673 * 206.42885 * 18 17 16 21 21 N 1.31615 * 119.99999 * 25.93247 * 20 18 17 22 22 Si 1.86799 * 119.99818 * 205.92887 * 20 18 17 23 23 H 1.48500 * 109.47116 * 0.02562 * 22 20 18 24 24 H 1.48489 * 109.47114 * 240.00126 * 22 20 18 25 25 H 1.48506 * 109.46682 * 120.00212 * 22 20 18 26 26 C 1.47161 * 117.86677 * 49.07942 * 17 16 14 27 27 C 1.53276 * 108.56047 * 309.13257 * 26 17 16 28 28 O 1.42064 * 110.33344 * 276.06047 * 14 13 12 29 29 H 1.08996 * 109.47423 * 300.00279 * 1 2 3 30 30 H 1.09004 * 109.46819 * 60.00494 * 1 2 3 31 31 H 1.09000 * 109.46994 * 179.97438 * 1 2 3 32 32 H 1.08999 * 109.47179 * 59.99875 * 3 2 1 33 33 H 1.08999 * 109.47063 * 299.99493 * 3 2 1 34 34 H 1.08999 * 109.46898 * 60.00112 * 4 3 2 35 35 H 1.08994 * 109.47544 * 300.00062 * 4 3 2 36 36 H 1.09008 * 109.46583 * 59.99754 * 5 4 3 37 37 H 1.09003 * 109.47106 * 300.00924 * 5 4 3 38 38 H 1.09002 * 109.47386 * 180.02562 * 8 6 5 39 39 H 1.08997 * 109.47181 * 300.00301 * 8 6 5 40 40 H 1.09003 * 109.47269 * 60.00031 * 8 6 5 41 41 H 1.09001 * 110.35696 * 322.89687 * 12 11 9 42 42 H 1.09001 * 110.35388 * 85.19465 * 12 11 9 43 43 H 1.08999 * 111.01538 * 205.56381 * 13 12 11 44 44 H 1.09005 * 111.00990 * 81.69115 * 13 12 11 45 45 H 1.08996 * 109.91198 * 59.10505 * 15 11 9 46 46 H 1.09004 * 109.91011 * 297.83630 * 15 11 9 47 47 H 1.08997 * 109.62420 * 312.44099 * 16 14 13 48 48 H 1.08999 * 109.52273 * 192.02181 * 16 14 13 49 49 H 0.97007 * 120.00238 * 4.02808 * 21 20 18 50 50 H 1.09006 * 109.62154 * 68.85625 * 26 17 16 51 51 H 1.09001 * 109.62416 * 189.21894 * 26 17 16 52 52 H 1.08995 * 109.51399 * 172.81343 * 27 26 17 53 53 H 1.08996 * 109.50472 * 292.96618 * 27 26 17 Note: An asterisk (*) indicates this parameter was or will be optimized. Cartesian coordinates (angstroms) NO. Atom X Y Z 1 6 0.0000 0.0000 0.0000 2 8 1.4290 0.0000 0.0000 3 6 2.0102 1.3055 0.0000 4 6 3.5354 1.1847 0.0006 5 6 4.1578 2.5824 0.0000 6 6 5.6829 2.4616 0.0000 7 1 5.9986 1.8457 0.8421 8 6 6.1432 1.8132 -1.3070 9 6 6.2954 3.8330 0.1232 10 8 5.5823 4.8107 0.2037 11 7 7.6357 3.9730 0.1451 12 6 8.6164 2.8749 0.0579 13 6 9.8988 3.4317 0.7277 14 6 9.8629 4.9106 0.2819 15 6 8.3637 5.2469 0.2613 16 6 10.5921 5.7757 1.2986 17 7 12.0386 5.5239 1.1787 18 6 12.8025 5.2525 2.2824 19 1 12.3503 4.8059 3.1555 20 6 14.1581 5.5514 2.2788 21 7 14.6188 6.5089 1.5021 22 14 15.3283 4.5946 3.3763 23 1 14.5662 3.5787 4.1458 24 1 15.9993 5.5277 4.3166 25 1 16.3499 3.9166 2.5384 26 6 12.6352 5.5671 -0.1659 27 6 11.8088 4.6713 -1.0954 28 8 10.4313 5.0499 -1.0126 29 1 -0.3634 0.5138 0.8899 30 1 -0.3633 0.5138 -0.8901 31 1 -0.3633 -1.0277 -0.0005 32 1 1.6885 1.8464 0.8900 33 1 1.6886 1.8464 -0.8900 34 1 3.8574 0.6437 -0.8891 35 1 3.8567 0.6440 0.8908 36 1 3.8357 3.1238 0.8896 37 1 3.8364 3.1228 -0.8904 38 1 7.2298 1.7267 -1.3069 39 1 5.7002 0.8213 -1.3962 40 1 5.8275 2.4291 -2.1492 41 1 8.2553 2.0002 0.5988 42 1 8.8120 2.6232 -0.9845 43 1 10.7882 2.9300 0.3466 44 1 9.8402 3.3490 1.8131 45 1 8.0836 5.7515 1.1859 46 1 8.1379 5.8829 -0.5947 47 1 10.2572 5.5201 2.3038 48 1 10.3846 6.8267 1.0980 49 1 14.0044 7.0446 0.9761 50 1 12.6234 6.5913 -0.5388 51 1 13.6625 5.2054 -0.1223 52 1 12.1581 4.7902 -2.1210 53 1 11.9193 3.6306 -0.7907 RHF calculation, no. of doubly occupied orbitals= 66 REFERENCES FOR PARAMETERS IN GAS-PHASE HAMILTONIAN: H: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) C: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) N: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) O: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) Si: (AM1): M.J.S.DEWAR, C. JIE, ORGANOMETALLICS, 6, 1486-1490 (1987). REFERENCE FOR CHARGE MODEL 2: J. Li, J. Xing, C. J. Cramer, and D. G. Truhlar, J. Chem. Phys. 111 (1999) 885. REFERENCE FOR THE PARAMETERIZATION OF THE SM5.42R SOLVATION MODEL: J. Li, T. Zhu, G. D. Hawkins, P. Winget, D. A. Liotard, C. J. Cramer, and D. G. Truhlar, Theor. Chem. Acc. 103 (1999) 9-63 P. Winget, J. D. Thompson C. J. Cramer,and D. G. Truhlar, J. Phys. Chem. B. submitted. CHARGE=-1 AM1 1SCF TLIMIT=15 GEO-OK SM5.42R & SOLVNT=GENORG IOFR=1.4345 ALPHA=0.00 BETA=0.00 GAMMA=38.93 & DIELEC=2.06 FACARB=0.00 FEHALO=0.00 DEV ZINC001717574547.mol2 53 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Sat Apr 11 2020 06:09:59 Heat of formation + Delta-G solvation = -106.202635 kcal Electronic energy + Delta-G solvation = -30948.071239 eV Core-core repulsion = 26820.503689 eV Total energy + Delta-G solvation = -4127.567551 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.82 seconds Orbital eigenvalues (eV) -40.60121 -39.20575 -38.30930 -36.40725 -35.71660 -34.74708 -32.33688 -31.37846 -30.64322 -29.78195 -27.82230 -27.35510 -26.03814 -25.55381 -23.98224 -23.49262 -22.59944 -21.54498 -20.89192 -19.26303 -18.81451 -17.61413 -17.16004 -16.72604 -16.55645 -16.30996 -15.83102 -15.43381 -15.23889 -14.92836 -14.82298 -14.53264 -14.09838 -13.98151 -13.72245 -13.57654 -13.38621 -13.08670 -12.80710 -12.69833 -12.55878 -12.42843 -12.38814 -12.12068 -11.89439 -11.62752 -11.55149 -11.50862 -11.25165 -11.09550 -10.98492 -10.89198 -10.73120 -10.62457 -10.51349 -10.18169 -10.04201 -10.00339 -9.73394 -9.46544 -9.23523 -8.62925 -8.42712 -6.98141 -6.18995 -3.33429 2.62497 2.90136 3.39648 3.44587 3.46712 3.60123 4.01472 4.32568 4.45251 4.50761 4.56906 4.67318 4.79923 4.80835 4.84914 4.95530 4.97814 5.05209 5.08382 5.15175 5.19194 5.26479 5.28515 5.33193 5.36208 5.39427 5.47299 5.52120 5.58533 5.63836 5.69093 5.74616 5.81061 5.84477 5.84782 6.01514 6.03514 6.07152 6.11967 6.21439 6.24799 6.28129 6.36240 6.54067 6.73542 6.77461 6.96864 7.51712 7.71124 7.85926 8.14887 8.44475 8.95540 9.71846 10.15165 11.11209 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.024779 B = 0.002057 C = 0.002004 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1129.724760 B =13605.602035 C =13966.220755 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.032 3.968 2 O -0.395 6.395 3 C 0.060 3.940 4 C -0.119 4.119 5 C -0.097 4.097 6 C -0.104 4.104 7 H 0.097 0.903 8 C -0.154 4.154 9 C 0.531 3.469 10 O -0.545 6.545 11 N -0.612 5.612 12 C 0.101 3.899 13 C -0.147 4.147 14 C 0.096 3.904 15 C 0.125 3.875 16 C 0.133 3.867 17 N -0.597 5.597 18 C -0.352 4.352 19 H 0.059 0.941 20 C -0.023 4.023 21 N -0.914 5.914 22 Si 1.070 2.930 23 H -0.292 1.292 24 H -0.293 1.293 25 H -0.289 1.289 26 C 0.117 3.883 27 C 0.042 3.958 28 O -0.375 6.375 29 H 0.041 0.959 30 H 0.040 0.960 31 H 0.085 0.915 32 H 0.050 0.950 33 H 0.050 0.950 34 H 0.074 0.926 35 H 0.071 0.929 36 H 0.073 0.927 37 H 0.071 0.929 38 H 0.068 0.932 39 H 0.070 0.930 40 H 0.060 0.940 41 H 0.075 0.925 42 H 0.072 0.928 43 H 0.093 0.907 44 H 0.084 0.916 45 H 0.081 0.919 46 H 0.077 0.923 47 H 0.066 0.934 48 H 0.026 0.974 49 H 0.270 0.730 50 H 0.026 0.974 51 H 0.087 0.913 52 H 0.085 0.915 53 H 0.050 0.950 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -20.464 -12.578 -5.243 24.586 Note: The Mulliken population analysis charges presented below were not used in the solvation calculation but are provided for completeness. The chosen solvation model uses CM2 partial charges for calculating solvation energies. Net atomic charges, atomic populations, and dipole contributions using Mulliken population analysis Atom NO. Type Charge No. of electrons 1 C -0.065 4.065 2 O -0.314 6.314 3 C -0.016 4.016 4 C -0.157 4.157 5 C -0.135 4.135 6 C -0.125 4.125 7 H 0.115 0.885 8 C -0.211 4.211 9 C 0.320 3.680 10 O -0.423 6.423 11 N -0.346 5.346 12 C -0.021 4.021 13 C -0.185 4.185 14 C 0.054 3.946 15 C 0.002 3.998 16 C 0.006 3.994 17 N -0.322 5.322 18 C -0.481 4.481 19 H 0.077 0.923 20 C -0.225 4.225 21 N -0.554 5.554 22 Si 0.900 3.100 23 H -0.218 1.218 24 H -0.220 1.220 25 H -0.216 1.216 26 C -0.009 4.009 27 C -0.035 4.035 28 O -0.294 6.294 29 H 0.059 0.941 30 H 0.059 0.941 31 H 0.103 0.897 32 H 0.068 0.932 33 H 0.068 0.932 34 H 0.093 0.907 35 H 0.090 0.910 36 H 0.092 0.908 37 H 0.090 0.910 38 H 0.087 0.913 39 H 0.088 0.912 40 H 0.079 0.921 41 H 0.093 0.907 42 H 0.091 0.909 43 H 0.111 0.889 44 H 0.102 0.898 45 H 0.100 0.900 46 H 0.095 0.905 47 H 0.085 0.915 48 H 0.043 0.957 49 H 0.081 0.919 50 H 0.044 0.956 51 H 0.105 0.895 52 H 0.103 0.897 53 H 0.068 0.932 Dipole moment (debyes) X Y Z Total from point charges -19.303 -12.350 -4.900 23.434 hybrid contribution -1.547 0.422 -0.197 1.615 sum -20.850 -11.928 -5.097 24.556 Atomic orbital electron populations 1.22735 0.81047 1.02710 1.00014 1.87862 1.19718 1.28323 1.95454 1.22566 0.94247 0.84436 1.00384 1.21582 0.92899 0.97638 1.03573 1.21293 0.92386 0.95975 1.03839 1.21217 0.96463 0.93990 1.00810 0.88470 1.21988 1.02426 1.01032 0.95694 1.20297 0.80329 0.91360 0.76014 1.90690 1.60125 1.40983 1.50516 1.48563 1.04946 1.08836 1.72266 1.22509 0.88885 0.89886 1.00840 1.23229 0.97045 0.96704 1.01535 1.22174 0.91446 0.95138 0.85871 1.21764 0.89160 0.86178 1.02714 1.21245 0.86235 0.95715 0.96186 1.44130 1.02474 1.83090 1.02508 1.19969 0.93286 1.39479 0.95317 0.92296 1.25875 0.96880 0.97672 1.02109 1.70736 1.39055 1.16185 1.29375 0.83451 0.75522 0.75547 0.75470 1.21782 1.22034 1.21615 1.21600 0.97797 0.96601 0.84879 1.23247 0.81461 0.98696 1.00128 1.87692 1.25707 1.87678 1.28301 0.94064 0.94092 0.89660 0.93194 0.93208 0.90706 0.90985 0.90823 0.91023 0.91313 0.91154 0.92078 0.90710 0.90944 0.88896 0.89764 0.90041 0.90498 0.91546 0.95655 0.91860 0.95604 0.89500 0.89688 0.93195 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 16. Note: The number of geometries may not correspond to the number of cycles due to rejected geometry changes. In the following table subtotal= G_P + SS G_CDS. Atom Chem. CM2 G_P Area Sigma k SS G_CDS Subtotal M number symbol chg. (kcal) (Ang**2) cal/(Ang**2) (kcal) (kcal) value 1 C 0.03 0.20 11.01 101.05 1.11 1.31 16 2 O -0.39 -3.67 10.70 -35.23 -0.38 -4.05 16 3 C 0.06 0.48 5.94 37.16 0.22 0.70 16 4 C -0.12 -0.94 5.34 -26.73 -0.14 -1.08 16 5 C -0.10 -0.90 4.03 -26.74 -0.11 -1.00 16 6 C -0.10 -1.01 2.08 -91.78 -0.19 -1.21 16 7 H 0.10 0.83 7.85 -51.93 -0.41 0.42 16 8 C -0.15 -1.29 8.76 37.16 0.33 -0.96 16 9 C 0.53 7.37 7.22 -10.99 -0.08 7.29 16 10 O -0.55 -9.44 16.25 5.56 0.09 -9.35 16 11 N -0.61 -8.52 3.33 -170.68 -0.57 -9.09 16 12 C 0.10 1.21 5.14 -2.43 -0.01 1.20 16 13 C -0.15 -2.18 5.90 -24.87 -0.15 -2.33 16 14 C 0.10 1.63 0.83 -89.94 -0.07 1.55 16 15 C 0.12 1.96 6.24 -3.33 -0.02 1.94 16 16 C 0.13 2.70 5.24 -4.05 -0.02 2.68 16 17 N -0.60 -14.16 2.81 -172.42 -0.48 -14.64 16 18 C -0.35 -9.31 9.55 -15.05 -0.14 -9.45 16 19 H 0.06 1.57 7.95 -52.49 -0.42 1.15 16 20 C -0.02 -0.62 4.68 -17.43 -0.08 -0.70 16 21 N -0.91 -26.51 12.50 55.49 0.69 -25.81 16 22 Si 1.07 24.35 29.99 -169.99 -5.10 19.25 16 23 H -0.29 -6.29 7.11 56.52 0.40 -5.88 16 24 H -0.29 -6.71 7.11 56.52 0.40 -6.31 16 25 H -0.29 -6.52 7.11 56.52 0.40 -6.11 16 26 C 0.12 2.61 4.88 -3.54 -0.02 2.59 16 27 C 0.04 0.76 6.76 37.30 0.25 1.01 16 28 O -0.37 -6.83 10.23 -35.23 -0.36 -7.19 16 29 H 0.04 0.22 8.14 -51.93 -0.42 -0.20 16 30 H 0.04 0.22 8.14 -51.93 -0.42 -0.20 16 31 H 0.08 0.42 8.14 -51.93 -0.42 0.00 16 32 H 0.05 0.38 8.14 -51.93 -0.42 -0.05 16 33 H 0.05 0.37 8.14 -51.93 -0.42 -0.05 16 34 H 0.07 0.56 6.56 -51.93 -0.34 0.22 16 35 H 0.07 0.56 8.14 -51.93 -0.42 0.14 16 36 H 0.07 0.75 7.96 -51.92 -0.41 0.34 16 37 H 0.07 0.71 8.14 -51.93 -0.42 0.28 16 38 H 0.07 0.57 5.00 -51.93 -0.26 0.31 16 39 H 0.07 0.47 6.56 -51.93 -0.34 0.13 16 40 H 0.06 0.55 8.14 -51.93 -0.42 0.13 16 41 H 0.07 0.72 7.37 -51.93 -0.38 0.34 16 42 H 0.07 0.84 7.07 -51.93 -0.37 0.47 16 43 H 0.09 1.45 5.98 -51.93 -0.31 1.14 16 44 H 0.08 1.28 7.84 -51.93 -0.41 0.88 16 45 H 0.08 1.28 7.79 -51.93 -0.40 0.88 16 46 H 0.08 1.28 8.06 -51.93 -0.42 0.86 16 47 H 0.07 1.32 7.73 -51.93 -0.40 0.92 16 48 H 0.03 0.54 8.14 -51.93 -0.42 0.12 16 49 H 0.27 7.94 6.62 -40.82 -0.27 7.67 16 50 H 0.03 0.61 7.79 -51.93 -0.40 0.20 16 51 H 0.09 2.13 6.44 -51.93 -0.33 1.80 16 52 H 0.09 1.34 8.14 -51.93 -0.42 0.92 16 53 H 0.05 0.87 6.13 -51.93 -0.32 0.55 16 LS Contribution 402.84 15.07 6.07 6.07 Total: -1.00 -31.84 402.84 -8.38 -40.22 By element: Atomic # 1 Polarization: 10.27 SS G_CDS: -9.22 Total: 1.05 kcal Atomic # 6 Polarization: 2.68 SS G_CDS: 0.87 Total: 3.55 kcal Atomic # 7 Polarization: -49.18 SS G_CDS: -0.36 Total: -49.54 kcal Atomic # 8 Polarization: -19.94 SS G_CDS: -0.65 Total: -20.59 kcal Atomic # 14 Polarization: 24.35 SS G_CDS: -5.10 Total: 19.25 kcal Total LS contribution 6.07 Total: 6.07 kcal Total: -31.84 -8.38 -40.22 kcal The number of atoms in the molecule is 53 The average number of expansion shells was 16.00 The maximum number of expansion shells was 16 The minimum number of expansion shells was 16 **** NOTA BENE **** This is the net solvation energy for this exact molecular structure (nuclear and electronic)! The standard-state solvation energy should be obtained as the difference between the heat of formation plus delta-G solvation for the relaxed solvated system and that for the relaxed gas-phase system. ZINC001717574547.mol2 53 1SCF run This is a breakdown of the solvation energy calculated without geometric relaxation in solution: (1) E-EN(sol) electronic-nuclear energy of solute -65.984 kcal (2) G-P(sol) polarization free energy of solvation -31.835 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -97.819 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.384 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.219 kcal (6) G-S(sol) free energy of system = (1) + (5) -106.203 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.82 seconds